Being asked to log in?

When I try to read any of the available manga, I'm asked to log in, because the chapter requires I have a subscription. Weird. I'm already logged in, aren't I? Well, whatever. So I click "OK".

I get redirected to the Login page, but before anything happens, I'm redirected back to the manga reader page, where I'm asked if I want to login again! This of course leads to an endless cycle, and appears to happen for any manga I'm trying to read, except Chapter 1s.

Just to make sure there wasn't something wrong with my account, the LN reader works just fine.

Just to make sure there wasn't something wrong with my account, the LN reader works just fine.

Obligatory have you tried turning it logging off and on again response.

Seriously, though, it works for me (also a non-premium member) on firefox even in private mode where you don't even stay logged in if you open something in new tab. If you want to help finding the issue you can probably open network tab in browser's dev tools (ctrl+I), go to manga reader and see where you get a non-successful response (codes 5xx or 4xx). Or at least mention what browser you're using.